Planograph co



W. L. SCOTT.

STEAM BOILER.

APPLICATION FILED 050.4, 1916.

1,3 10,807. Patented July 22, 1919.

THE COLUMBIA PLANOGRAPH co., WASHINGTON. n. c.

d STATS WI LIAM L. soon, or MONTREAL, QUEBEC, CANADA.

STEAM-BOILER.

To all whom it may concern:

Be it known that'I, WILLIAM L. Scowr, a subject of the King of Great Britain, residing in the city of Montreal, Provinceof Quebec, Dominion of Canada, have invented certain'new and. useful Improvements in Steam -Boilers; and I do hereby declare that the following is a full, clear, and exact description of the same.

Myinvention relates particularly. to locomotive boilers, although it ma be applied with advantage to any loc motive-type boiler; and the objects of myinvention are, to thoroughly commingle the products of combustion inthe firebox before) entering the tubes, and topromote the circulation of such products; to present a greater heating surface to the init1al action of the fire; to construct a form of, fireiboxreadily accessiblefor repairs and cleaning, and ablefto resists the stress incident to high steam pressure; topromote thecirculation of the water surrounding the heat tubes;-an'dto provide a boiler of the locomotive type in which, without the use of a-su 'erheater, the steam will reach the steam-c est or other point of delivery from the boiler at atem-.

perature equal to or greater than that ob tained in the boilers of the same type heretofore in use and equipped with superheaters.

My invention may be said briefly to consist of an extension of the tubes of the boiler through the tube sheet into the fire box, with a leg connecting the top of this extension with the top of the boiler and barrel while an extended steam space is formed above the fire box and extending from a short distance in front of the fire box to the rear end of the barrel and preferably equaling in height the top of the cab which permits the entire boiler barrel to be submerged. The advantage of this is that the circulation of the water surrounding the heating tubes is very much improved. The resultant temperature is higher than obtainable in non-submergible boilers, and without a superheater equals or exceeds that'obtainable in locomotives or locomotive-type Y boiler' equipped with superheaters. In order to prevent dead spaces within the fire box the extension of the'tubes within the same is preferably not applied to the outer most series, which terminate at the tubesheet as usual.

For further comprehension, however, of

K Application filed December 4, 1916. Serial No. 135,038.

specifieatibn 0f Let e Patented July 22, 1919.

my invention reference must behad to the accompanying drawings in which similar reference characters indicatethe same parts and wherein;

Figure 1 is a side elevation of a locomo tive in themainof standard type and with my invention applied thereto;

; F ig. 2 is ,a longitudinal vertical sectional view-thereof taken on line 22, Fig. 3;

Fig. 3 is ahorizontal sectional view taken online3-3, Fig. 2; r -Fig. 4 is a transverse vertical sectional view taken on line44, Fig. 2. v

By referringto. Fig. 1 it will be seen that the forward position of the boiler and barrel is unchanged from the standard type, but the fire-box portion; is raised to present a relatively. large steam space 6 in the form of an areinfcrossssectiomits side lines coin ciclingwith the side lines of the boiler barrel, with the wallofwhich it is formed as an integral part. The crown sheet 0 ofthe firebox is flat and extends forwardly to within ashort distance of the forward end of the steam space b thus providing a passage (1 effecting communication between the space within theboiler barrel surrounding the tubes and this steam space 6. An auxiliary 'a tube sheet.

The top of the auxiliary barrel 6 and the crown sheet 0 are connected by a leg m ex tending from the crown sheet substantially to rear end of the auxiliary barrel and effects open connection between the spaces within the latter, the upper portion of the main barrel and the steam space.

Operation.

The heat from the fire in the fire-box is deflected by the auxiliary barrel and the draft of the flues extending therethrough causes the hot gases to cling to the surface of this auxiliary barrel and impart to them a reverberatory action within the fire-box,

thereby eifecting a thorough coinmingling of the air and gases and promoting perfect combustion. The'result is that the greatly increased heating surface presented by the auxiliary barrel and the leg connecting the ough commingling of the products ofcom bustion and air in the fire-box, promotes the circulation of such products in the fire-box and through the tubes, this being secured by' the tubes leading from the space between the auxiliary barrel and the walls of the firebox. Another advantage being that the particular location. and the extent of the steam space 6 promotes the circulation of the water and collecting of the steam.

'What I claim is as follows 2- 1. In a horizontal tubular boiler, the combination with the barrel, fire box and a steam space above the'fire box, of an auxiliary boiler barrel projecting into the fire box, a leg equal in extent to the auxiliary barrel and communicating with the said auxiliary barrel, the main barrel and the steam space above the fire box, the said auxiliary barrel being of less diameter than the main barrel, a series of tubes Within the sald main barrel and communicating with the fire box'outside of the auxiliary barrel and an inner series of tubes within the said mai'n'barrel and extending through the auxiliary barrel and communicating with the auxiliary boiler barrel projecting into the fire box, a leg equal in extent toft'he'auxiliary barrel and communicating with the said auxiliary barrel,the-main barrel and the steam space, the said auxiliary barrel being of less diameter than the main barrel,"a series of tubes within the said main barrel and communicating with the fire boxoutside of the auxiliary barrel and an inner series of tubes within the said main barrel andextending through the said auxiliary barrel and communicating with the fire box at the end of the said auxili'ary barrel. In testimony whereof'I have signed my name to this specificationinthe presence of twowitnessesg a:

WILLIAM Ii. SCOTT.

Witnesses? 1 p a WILLIAM J Huwnrsou,

G. J. E. CHARBoNNnAu.

copies of this patent may be obtained ror five cents each, by addressing the Commissioner. of "Patents,

Washington, D. 9 i 

